George e



G. H". HAMMOND.l Heating Drum.-

Patented-March 5. 186?.

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glatten tstes latrnt @fitta IMPROVED STOVE-PIPE DRUM.

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TO. ALL WHOM IT MAY CONCERN:

Be it known that I, GEORGE H. HAMMOND, of Oneonta, Otsego county, and State of New York, have invented a new and improved Heat Extractor or Stove-Pipe Drum; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the sanie, referd ence being had to the accompanying' drawing, forming part of this specification, in Which- Figure 1 is a side View of my improved heat extractor, part of the outer cylinder being cutaway through the line :t x, iig. 3.

Figure 2 is a vertical longitudinal centralsection of the same, taken through the line y y, ig. 4.

Figure 3 is a horizontal cross-section of the same, taken through the line z z, tig. l.

Figure 4 is a top View of the samel Similar letters of.rei`erence indicate like parts.

My invention has for its object to furnish an improved apparatus for extracting the heat from thesmolle' and other products of combustion passing oil` through the stove pipe, and which would otherwise be lost; and it consists, iirst, in the construction, combination, and arrangement of the disks with each other, with the interior, in i leixnediate, and exterior cylinders, and with the short air pipes, as hereinafter more fully described; and second, i1: the '.mubination of a'da'mper, constructed as hereinafter described, with the upper disk of the heat extractor.

:l .ind B are the upper and lower end disks of the heat extractor. These disks are made with holes through A their centres, provided with outwardly projecting ilanges al and bl, by means of which, they are connected with the draught or smokeA pipe of the stove. The disks A and B are also made with seven other holes through them, having inwardly projecting flanges a2 and bl, by means of which the short pipes C are connected to them, as shown in figs. 1 and 2. The disks A and B are also made with inwardly projecting flanges a3 and b3 around their outer edges, by means of which they are connected to the outer cylinder D. The disks E andlll are made with holes through their centres, somewhat smaller than the central holes through the disks A and D, and hav' ing inwardly projecting flanges el and fl, by means of which they lare connected to the interior cylinder Cr, as shown in fig. 2. The disks E and F are also made with seven other holesthrough them, corresponding in size and position to the holes through the disks A and B, and having outwardly projecting ilanges el andfl, by means of which they are connected to the short pipes C. They are also made with inwardly projecting flanges e3 and fl around their outer edges, by means of which they are connected to the edges of the disks H and I, as

shown in iig. 2. The disks H and I are made concave on their outer sides 4and convexjon their -inner.sides, as shown in tig. 2, and have holes through their centres, through which the interior cylinder G passes, and having' inward flanges hl and il, by means of which they are connected to the intermediate cylinder J, as shown in iig. 2. l, L, and M are disks, of sucha size as to ll the space between the cylinders D and J', and which have ears or'langes kl, ll, ml formed upon their inner edges, by means of whichthey are riveted to the cylinder J, as shown in iigs. 1 and2. From one-quarter to one-third of these disks K L M is cut away, es shown in rigsY I and 3, and they are so arranged that their ends may overlap each other, as shown in dotted lines in iig. 3. The disks K L M arc represented in the drawings as being three in number, but more may be used if desired, the number to be used depending upon the size of the apparatus. The disks A and E and the disks B and F are held together by the rods and nuts N, and the entire apparatus is held together by the rods and nuts 0. P is a damper attached to a rod pl, byv means of which it is pivoted to the cylinder G. One end of the rod iol is extended so as to pass out through the cylinders J and D, and which terminates in a handle, p2, by means of` which the damper is operated. The damper P should be of such a size that when turned into a horizontal position it will entirely stop the draught through the cylinder Cr. R isA a damper, pivoted to the flange al of the disk A, one end of the pivoting-rod terminating in a handle, 1', by means of which the said damper is operated. The wings ot' the damper It are cut ofi, as shown in g. 4, so that the damper may be turned into a horizontal position and almost entirely check the escapeof the heat, and yet allow a sufficient draught to the stove to pred vent the escape of smoke or gas into theV room.

In using the apparatus the damper P. is turned into a horizontal position. This 'prevents the smoke from passing olf through the cylinder Gr, and it is compelled to pass through the spaces between the short pipes C, between the disks B and E, and around the edges of the disks F and I into the space between the cylinders D- and J. As it rises in said space it encounters the disk M, along the `under side of which it passes' until it reaches the opening through the said disk, through which it rises to the disk L, upon striking which it divides into two currents which pass around in opposite .directions to the opening through said disk, and so on till it reaches the disk H, over the edge of which it rises into the space between the disks E'and A and the pipes C, and thence into thestove pipe. The cold air enters through the holes 4in the disk .13, passes through the space between the disks F and I, through the spa-ce between the cylinders D and J, through the space-between Athe disks H und E, and through the vpipes C into the room, being through all its course in contact with surfaces very much heated by checking the direct ascent of the heat andl smoke, and thus almost Wholly extracting the heat 'from the smoke and gases escaping through the chimney.

I claim as new, and desire to secure by Letters Patcnt- The construction, combination, and arrangement of the disks AE H K L MI F B with each other, with the interior, intermediate, and exterior cylinders GJ D, and with the short pipes C, substantially as described and for the purpose set forth.

GEORGE H. HAMMOND.

Witnesses:

JOSEPH SHooK, LESTER WESTON. 

